JP2014008534A - Press brake and upper die holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press brake with locking piece immersion means at an upper die mounting part that can remove the upper die downwardly by releasing locking of a locking piece included in the upper die.SOLUTION: A press brake includes: a die mounting groove 7 for detachably mounting an upper die 3 long in right and left direction at a lower part of an upper table 1; and also includes: a locking groove 15 long in the right and left direction, the locking groove for freely locking a locking piece 13 that is retractably included on the surface of the upper die 3 on at least one wall surface of the front or rear wall surface of the die mounting groove 7. The press brake also includes: locking piece immersion means 33 for immersing the locking piece 13 of the upper die 3 locked to the locking groove 15 into the upper die 3 in a proper position of the locking groove 7. Then, the locking piece immersion means 33 includes: a locking piece pressing member 41 longitudinally movable in the locking groove 15 to immerse the locking piece 13 in the upper die.

Description

  The present invention is provided with a mold mounting groove that can be attached to and detached from the upper mold in the lower part of the upper table in the press brake, and is provided on at least one of the front wall surface and the rear wall surface of the mold mounting groove. The present invention relates to a press brake provided with a locking groove capable of locking a locking piece provided so as to be able to protrude and retract with respect to the surface of the mold, and a press brake provided with a long left and right direction, and an upper mold holder provided with a similar configuration. A press brake and an upper mold provided with an upper table and an upper mold holder with locking piece immersion means for immersing the locking piece in the upper mold in order to detach the upper mold from the upper table in the vertical direction. Regarding the holder.

  The press brake includes one of upper and lower tables provided opposite to each other as a ram that can move up and down. Then, by placing a plate-shaped workpiece between the upper mold mounted on the upper table and the lower mold mounted on the lower table, the upper mold and the lower mold are engaged, thereby bending the workpiece. Is going. As described above, when bending a workpiece, upper and lower molds are attached to a plurality of locations on the upper and lower tables, and step bending may be performed.

  The upper and lower molds are attached and detached in accordance with the bending process conditions. In order to prevent the upper mold from dropping when the mold is replaced, on the wall surface of the upper mold on the front wall surface or the rear wall surface of the left and right mold mounting groove provided in the lower part of the upper table, There has been proposed a press brake that has a locking groove that can be locked to allow the locking piece that can be freely moved to extend in the left-right direction (see, for example, Patent Document 1).

International Publication Number WO 00/41824

  The press brake described in Patent Document 1 is configured to include an upper and lower table that is long in the left-right direction (X-axis direction), and is attached to and detached from the upper mold mounting portion and the upper table provided at the lower portion of the upper table. The flexible upper mold has a configuration as shown in FIG. That is, an upper mold mounting portion 5 in which the upper mold 3 can be freely attached and detached is provided at the lower part of the upper table 1 in the press brake (the entire configuration is not shown). A long die mounting groove 7 is provided in a direction (a direction perpendicular to the paper surface in FIG. 6). Further, on the front wall surface 9 and the rear wall surface 11 in the mold mounting groove 7, a locking groove 15 that can lock the locking piece 13 provided on the upper mold 3 is formed long in the left-right direction.

  The upper die 3 is provided with a mounting portion 17 that can be attached to and detached from the upper die mounting groove 7 at the top, and V-shaped fixing is provided on both front and rear surfaces (both sides in the Y-axis direction) of the mounting portion 17 Grooves 19 are formed in the left-right direction. And the said locking piece 13 is provided in the recessed part 21 formed in the lower part of this groove | channel 19 for fixation. The locking piece 13 is always pressed and urged so as to protrude from the recess 21 by an elastic member (not shown) such as a coil spring incorporated therein.

  That is, the locking piece 13 is provided so as to be able to protrude and retract with respect to the surface of the upper mold 3. A hook-shaped locking protrusion 13 </ b> A that is detachably engageable with the locking groove 15 is provided on the locking piece 13. Further, a push button portion 13B for pressing against the urging force of the elastic member is provided below the locking piece 13. In the lower side of the locking piece 13, a through hole 23 in the front-rear direction is formed in the mounting portion 17.

  In order to press and fix the mounting portion 17 after mounting the mounting portion 17 of the upper mold 3 in the mold mounting groove 7 in the upper mold mounting portion 5, the upper mold mounting portion 5 includes the upper mold 3. A pressing and fixing piece 25 is provided which can be engaged with the fixing groove 19 and can be moved in and out with respect to the front wall surface 9 of the mold mounting groove 7. The pressing and fixing piece 25 presses and fixes the mounting portion 17 by the operation of an actuator 27 such as a fluid pressure cylinder.

  As already understood, in the state where the locking protrusion 13A of the locking piece 13 is locked to the locking groove 15 and the pressing of the pressing fixing piece 25 is loosened, the upper die 3 does not fall. It is in a state of being mounted on the upper mold mounting portion 5. The upper mold 3 is movable in the left-right direction along the mold mounting groove 7 in the upper mold mounting portion 5. Therefore, the upper mold 3 can be attached to and detached from the upper table 1 by moving in the left-right direction with respect to the upper table 1.

  Further, a finger 31 provided at the tip of the robot hand 29 in a robot for replacing the upper die 3 (not shown) is inserted into the through hole 23, and a pressure provided at the tip of the finger 31 is inserted. By pushing the push button portion 13B of the locking piece 13 against the urging force by the projection 31A and immersing the locking piece 13 into the recess 21, the locking projection 13A on the locking piece 13 is locked into the locking groove. 15 can leave. Therefore, in this case, the upper mold 3 can be attached and detached in the vertical direction with respect to the upper mold mounting portion 5 in the upper table 1.

  As described above, when the upper die 3 is attached and detached in the vertical direction, since the finger 31 in the robot is inserted through the through hole 23, the upper die 3 does not fall and is safe.

  As already understood, when the upper mold 3 is moved in the left-right direction along the mold mounting groove 7 in the upper mold mounting portion 5 and the upper mold 3 is attached and detached, the upper mold 3 is attached to the upper table 1. It is necessary to move to the left and right ends, and there is a problem in improving the efficiency of attaching and detaching the upper mold 3. Further, when separate upper molds are arranged on both the left and right sides of the upper mold 3 to be replaced, it is necessary to attach and detach these separate upper molds too, and it is extremely troublesome to attach and detach the upper mold 3. It will be a difficult task.

  When the upper die 3 is attached to and removed from the upper die mounting portion 5 in the vertical direction, a robot is required and a through hole 23 is required in the upper die 3. In addition, when the width dimension of the upper mold 3 in the left-right direction is small and the upper mold 3 can be held with both hands and the push button portion 13B can be manually pressed, the upper mold 3 can be manually detached in the vertical direction. is there. However, when the left and right sides of the upper mold 3 are held with both hands, the push button portion 13B cannot be pushed, or the push button portion 13B cannot be pushed manually against a strong biasing force. Therefore, it is impossible to attach and detach the upper die 3 in the vertical direction.

  The present invention has been made in view of the above-described problems. The upper and lower mold mounting grooves are provided in the lower part of the upper table in the left-right direction, and the front or rear wall surface of the mold mounting groove is provided. A press brake having at least one of the wall surfaces provided with a locking groove that can be locked to the surface of the upper mold so that the locking piece is movable in the left-right direction. Locking piece immersing means for immersing the locking piece of the stopped upper die into the upper die is provided at an appropriate position of the locking groove.

  Further, in the press brake, the locking piece immersing means includes a locking piece pressing member that is movable back and forth in the locking groove to immerse the locking piece in the upper mold. To do.

  Further, in the press brake, the locking piece immersing means relatively presses the locking piece provided in the upper mold into the upper mold when the upper mold moves in the left-right direction along the mold mounting groove. A wedge-shaped member for immersing is provided so that the position can be adjusted to or detached from an arbitrary position of the locking groove.

  An upper mold holder provided at the lower part of the upper table in the press brake, wherein the upper mold holder is provided with a mold mounting groove that is detachable in the left-right direction, and the front wall surface of the mold mounting groove Alternatively, on at least one wall surface of the rear wall surface, a locking groove that can be locked in and out with respect to the surface of the upper mold is provided with a locking groove that can be locked in the left-right direction, and is locked in the locking groove. A locking piece immersion means for immersing the locking piece of the mold into the upper mold is provided at an appropriate position of the locking groove.

  In the present invention, the locking piece immersion means for immersing the locking piece provided in the upper mold into the upper mold is provided at an appropriate position of the locking groove in the mold mounting groove. By positioning the upper mold at a position corresponding to the immersion means, the locking piece can be immersed in the upper mold. Therefore, the upper die can be attached and removed in the vertical direction with the locking piece immersed.

It is explanatory drawing which shows the structure of the upper mold | type mounting part in the press brake which concerns on embodiment of this invention. It is explanatory drawing which shows the structure of the upper mold | type mounting part in the press brake which concerns on embodiment of this invention. It is a perspective explanatory drawing which shows the structure of a locking piece immersion means. It is explanatory drawing which shows 2nd Embodiment of an upper mold | type mounting part. It is explanatory drawing which shows 3rd Embodiment of an upper mold | type mounting part. It is explanatory drawing which shows the related structure of the upper mold | type mounting part of a conventional structure, and an upper mold | type.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to components having the same functions as those of the above-described conventional components, and redundant description will be omitted.

  As schematically shown in FIG. 1, the press brake according to the embodiment of the present invention is configured so that the locking piece 13 in the upper mold 3 in the state of being mounted in the mold mounting groove 7 in the upper mold mounting portion 5 The locking piece immersing means 33 for immersing into the recess 21 of the mold 3 is provided at an appropriate position in the left-right direction of the upper mold mounting portion 5. The locking piece immersion means 33 is unitized as shown in FIG.

  That is, the locking piece immersion means 33 includes a unit main body 37 that is detachably attached to the front and rear surfaces of the upper mold mounting portion 5 by a fixture 35 (see FIG. 3) such as a mounting bolt. As shown in FIG. 3, the unit main body 37 is configured to be long in the left-right direction (X-axis direction), and the upper mold is disposed on the mounting surface 39 side in the front-rear direction (Y-axis direction) of the unit main body 37. 3 is provided with a locking piece pressing member 41 capable of pressing the locking projection 13A of the locking piece 13 in FIG.

  As shown in FIG. 3, the locking piece pressing member 41 is formed long in the left-right direction, and inclined surfaces 41S in the front-rear direction are formed on both left and right ends. The locking piece pressing member 41 is inserted in a communicating hole 43 (see FIG. 1) formed in the upper mold mounting portion 5 so as to communicate with the locking groove 15 so as to be movable back and forth. In order to move the locking piece pressing member 41 back and forth, the unit main body 37 is provided with pressing means and return means for returning to the original state.

  More specifically, as an example of the pressing means, a cylindrical shrinkable bag 45 that is extendable (can be reduced and enlarged) is provided in the unit main body 37 in the left-right direction. It is in contact with the locking piece pressing member 41. As an example of the return means, a stator 47 such as a bolt having a distal end portion screwed and fixed to the locking piece pressing member 41 is penetrated and supported at a plurality of locations of the unit main body 37 so as to be movable back and forth. ing. An elastic member 49 such as a coil spring is provided as a return spring between the head of the stator 47 and the bottom of the hole formed in the unit main body 37. In order to regulate the stroke end of the stator 47, the stator 47 is provided with a stroke regulating collar 51.

  With the above-described configuration, in the normal state, the locking piece pressing member 41 is inserted into the locking groove 15 in the mold mounting groove 7 by the action of the elastic member 49 and is positioned in the communication hole 43 (FIG. 1 ( A) and FIG. 2 (A)). Therefore, the upper mold 3 is mounted in the mold mounting groove 7 in the upper mold mounting portion 5, and the locking protrusion 13A of the locking piece 13 provided in the upper mold 3 is locked in the locking groove 15 (FIG. 1 (A)), the upper die 3 can be moved in the direction along the die mounting groove 7 (left and right direction). That is, in a state where the locking piece pressing member 41 is located in the communication hole 43, the upper mold 3 is mounted at an arbitrary position of the mold mounting groove 7 or over the entire length of the mold mounting groove 7. It is something that can be done.

  When the working fluid is supplied to the contraction bag 45 to expand and expand the contraction bag 45, the locking piece pressing member 41 is pressed and moved into the locking groove 15 against the urging force of the elastic member 49. (See FIGS. 1B and 2B). Therefore, when the upper mold 3 is located at a position facing the locking piece pressing member 41, the locking protrusion 13A of the locking piece 13 locked in the locking groove 15 in the upper mold 3 is pressed. The locking piece 13 is immersed in the recess 21 of the upper mold 3. Therefore, the locking projection 13A is unlocked from the locking groove 15, and the upper die 3 can be removed downward.

  By the way, as described above, when the locking piece pressing member 41 is in the locking groove 15 (the state shown in FIGS. 1B and 2B), the mold of the upper mold mounting portion 5 is used. When the upper mold 3 mounted in the mounting groove 7 is moved in the left-right direction and moved to a position corresponding to the locking piece pressing member 41, the inclined surfaces 41S provided on the left and right ends of the locking piece pressing member 41 By the action, the locking protrusion 13A of the locking piece 13 is gradually pressed. That is, the locking piece 13 is gradually immersed in the recess 21. Therefore, the upper mold 3 can be removed downward also by moving the upper mold 3 in the left-right direction to a position corresponding to the locking piece pressing member 41.

  In addition, mounting from the lower side of the upper mold 3 to the mold mounting groove 7 in the upper mold mounting portion 5 can be performed at an arbitrary position as in the conventional case.

  As will be understood from the above description, the upper die 3 is moved and positioned to a position corresponding to the locking piece immersing means 33 so that the locking piece 13 provided in the upper die 3 is moved into the recess 21 of the upper die 3. The upper die 3 can be removed downward from the upper die mounting portion 5. In other words, the robot can be manually removed downward without using a robot such as that shown in Patent Document 1.

  Therefore, the upper mold 3 does not require the through hole 23 as described above, and the upper mold 3 can be manufactured more easily. When the upper die 3 is removed downward using the robot, the upper die 3 is gripped from the left and right direction (the width direction of the upper die 3) by the robot hand, and the position corresponding to the locking piece immersion means 33 is obtained. As long as the upper mold 3 can be moved, a general industrial robot can be used.

  Further, as understood from the above description, a communication hole 43 that communicates with the locking groove 15 in the mold mounting groove 7 is formed in the upper mold mounting portion 5, and the locking piece immersion means 33 is connected to the upper mold mounting portion 5. Therefore, the locking piece immersion means 33 can be retrofitted to the configuration described in Patent Document 1 described above, for example.

  FIG. 4 shows a second embodiment. In this embodiment, a wedge-shaped member 55 having the same shape or similar shape to the locking piece pressing member 41 is attached to an appropriate position in the left-right direction of the locking groove 15 in the mold mounting groove 7 of the upper mold mounting portion 5. It is the structure attached so that attachment or detachment was possible with appropriate attachments 53, such as a volt | bolt.

  In the above configuration, since the wedge-shaped member 55 is in an immobile state, the upper mold 3 mounted in the mold mounting groove 7 is moved in the left-right direction along the mold mounting groove 7 to correspond to the wedge-shaped member 55. By moving the upper die 3, the locking piece 13 provided in the upper die 3 is immersed in the recess 21 of the upper die 3, and the upper die 3 can be removed downward.

  Even in the above configuration, the wedge-shaped member 55 can be retrofitted. By the way, by providing a plurality of through-holes 57 into which the fixture 53 can be inserted in the upper mold mounting portion 5 in the left-right direction at appropriate intervals, the wedge-shaped member 55 is adjusted in the left-right direction with respect to the locking groove 15. It can be installed.

  FIG. 5 shows a third embodiment. In this embodiment, the upper surface of the locking groove 15 in the mold mounting groove 7 of the upper mold mounting portion 5 is formed by a presser guide member 61 detachably attached by a plurality of fixing tools 59 such as bolts. is there. The presser guide member 61 is provided long in the left-right direction over the entire length of the upper mold mounting portion 5. A wedge-shaped member 55A corresponding to the wedge-shaped member 55 is disposed in the locking groove 15 so as to be movable and fixed in the left-right direction.

  That is, the wedge-shaped member 55A is provided with a protruding portion 63 protruding upward. In the presser guide member 61, an L-shaped guide recess 65 for guiding the protruding portion 63 in the left-right direction is formed in the left-right direction over the entire length. The guide recess 65 has a function of guiding the protrusion 63 in the left-right direction when the fixture 59 is loosened. And when the said fixing tool 59 is clamp | tightened, there exists a function which presses and fixes the said protrusion part 63 to the upper mold | type mounting part 5. FIG.

  As already understood from the above description, the wedge-shaped member 55A can be adjusted to any position in the left-right direction of the locking groove 15 in the mold mounting groove 7. Then, when the upper mold 3 mounted in the mold mounting groove 7 is moved in the left-right direction along the mold mounting groove 7 and moved to a position corresponding to the wedge-shaped member 55A, the upper mold 3 is similarly disposed. The locking piece 13 provided in the above is immersed in the recess 21 of the upper mold 3. Therefore, this embodiment can achieve the same effect as the above-described embodiment.

  The present invention is not limited to the embodiment as described above, and can be implemented in other forms by making appropriate changes. For example, the upper mold mounting portion 5 in the embodiment can be configured to be detachable from the upper table 1 in the press brake. In this case, the upper mold mounting portion 5 corresponds to an upper mold holder that is detachably provided at the lower portion of the upper table 1 in the press brake. That is, the same structure as that of the upper mold mounting portion 5 can be adopted for the upper mold holder in the press brake.

DESCRIPTION OF SYMBOLS 1 Upper table 3 Upper mold | type 5 Upper mold | type mounting part 7 Mold mounting groove 13 Locking piece 13A Locking protrusion 15 Locking groove 21 Recessed part 33 Locking piece immersion means 37 Unit main body 41 Locking piece pressing member 41S Inclined surface 55, 55A Wedge-shaped member 61 Presser guide member 63 Projection portion 65 Guide recess

Claims (4)

  A mold mounting groove that allows the upper mold to be freely attached is provided in the lower part of the upper table in the left-right direction, and at least one of the front wall surface and the rear wall surface of the mold mounting groove protrudes and protrudes from the surface of the upper mold. A press brake having a locking groove that can be freely locked in the left and right direction, and the upper locking piece locked in the locking groove is immersed in the upper mold. The press brake is characterized in that a locking piece immersing means is provided at an appropriate position of the locking groove.   2. The press brake according to claim 1, wherein the locking piece immersing means includes a locking piece pressing member that is movable back and forth in the locking groove to immerse the locking piece in the upper mold. Press brake characterized by.   2. The press brake according to claim 1, wherein the locking piece immersing means moves the locking piece provided in the upper mold relative to the upper mold when the upper mold moves in the left-right direction along the mold mounting groove. A press brake comprising a wedge-shaped member for pressing and immersing in a movable manner so that the position of the wedge-shaped member can be adjusted to or detached from an arbitrary position of the locking groove.   An upper mold holder provided in the lower part of the upper table in the press brake, wherein the upper mold holder is provided with a mold mounting groove that is detachable in the left-right direction, and the front wall surface or the rear of the mold mounting groove. An upper mold that is provided with a locking groove that can be locked in a left-right direction on at least one wall surface of the upper mold so that the locking piece can be protruded and retracted with respect to the surface of the upper mold. An upper holder comprising an engagement piece immersion means for immersing the engagement piece in the upper mold at an appropriate position of the engagement groove.

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